Abstract
We present evidence of the gravitational lensing of the cosmic microwave background by solar mass dark matter halos. Lensing convergence maps from the Atacama Cosmology Telescope Polarimeter (ACTPol) are stacked at the positions of around 12 000 optically selected CMASS galaxies from the SDSS-III/BOSS survey. The mean lensing signal is consistent with simulated dark matter halo profiles and is favored over a null signal at significance. This result demonstrates the potential of microwave background lensing to probe the dark matter distribution in galaxy group and galaxy cluster halos.
- Received 30 November 2014
- Publisher error corrected 17 April 2015
DOI:https://doi.org/10.1103/PhysRevLett.114.151302
© 2015 American Physical Society
Corrections
17 April 2015
Erratum
Publisher’s Note: Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos [Phys. Rev. Lett. 114, 151302 (2015)]
Mathew Madhavacheril et al. (Atacama Cosmology Telescope Collaboration)
Phys. Rev. Lett. 114, 189901 (2015)
Viewpoint
Weighing Dark Matter Halos with the Cosmic Microwave Background
Published 13 April 2015
Gravitational lensing by foreground dark matter halos leaves an observable imprint on the cosmic microwave background, which can be used to determine their masses
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